From 6b23a2c125b9c48b5ebea92716004ef68698bb0f Mon Sep 17 00:00:00 2001
From: gdkchan <gab.dark.100@gmail.com>
Date: Wed, 17 Apr 2019 20:57:08 -0300
Subject: New shader translator implementation (#654)

* Start implementing a new shader translator

* Fix shift instructions and a typo

* Small refactoring on StructuredProgram, move RemovePhis method to a separate class

* Initial geometry shader support

* Implement TLD4

* Fix -- There's no negation on FMUL32I

* Add constant folding and algebraic simplification optimizations, nits

* Some leftovers from constant folding

* Avoid cast for constant assignments

* Add a branch elimination pass, and misc small fixes

* Remove redundant branches, add expression propagation and other improvements on the code

* Small leftovers -- add missing break and continue, remove unused properties, other improvements

* Add null check to handle empty block cases on block visitor

* Add HADD2 and HMUL2 half float shader instructions

* Optimize pack/unpack sequences, some fixes related to half float instructions

* Add TXQ, TLD, TLDS and TLD4S shader texture instructions, and some support for bindless textures, some refactoring on codegen

* Fix copy paste mistake that caused RZ to be ignored on the AST instruction

* Add workaround for conditional exit, and fix half float instruction with constant buffer

* Add missing 0.0 source for TLDS.LZ variants

* Simplify the switch for TLDS.LZ

* Texture instructions related fixes

* Implement the HFMA instruction, and some misc. fixes

* Enable constant folding on UnpackHalf2x16 instructions

* Refactor HFMA to use OpCode* for opcode decoding rather than on the helper methods

* Remove the old shader translator

* Remove ShaderDeclInfo and other unused things

* Add dual vertex shader support

* Add ShaderConfig, used to pass shader type and maximum cbuffer size

* Move and rename some instruction enums

* Move texture instructions into a separate file

* Move operand GetExpression and locals management to OperandManager

* Optimize opcode decoding using a simple list and binary search

* Add missing condition for do-while on goto elimination

* Misc. fixes on texture instructions

* Simplify TLDS switch

* Address PR feedback, and a nit
---
 Ryujinx.Graphics/Shader/StructuredIr/AstHelper.cs | 73 +++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 Ryujinx.Graphics/Shader/StructuredIr/AstHelper.cs

(limited to 'Ryujinx.Graphics/Shader/StructuredIr/AstHelper.cs')

diff --git a/Ryujinx.Graphics/Shader/StructuredIr/AstHelper.cs b/Ryujinx.Graphics/Shader/StructuredIr/AstHelper.cs
new file mode 100644
index 00000000..9d3148e1
--- /dev/null
+++ b/Ryujinx.Graphics/Shader/StructuredIr/AstHelper.cs
@@ -0,0 +1,73 @@
+using Ryujinx.Graphics.Shader.IntermediateRepresentation;
+
+namespace Ryujinx.Graphics.Shader.StructuredIr
+{
+    static class AstHelper
+    {
+        public static void AddUse(IAstNode node, IAstNode parent)
+        {
+            if (node is AstOperand operand && operand.Type == OperandType.LocalVariable)
+            {
+                operand.Uses.Add(parent);
+            }
+        }
+
+        public static void AddDef(IAstNode node, IAstNode parent)
+        {
+            if (node is AstOperand operand && operand.Type == OperandType.LocalVariable)
+            {
+                operand.Defs.Add(parent);
+            }
+        }
+
+        public static void RemoveUse(IAstNode node, IAstNode parent)
+        {
+            if (node is AstOperand operand && operand.Type == OperandType.LocalVariable)
+            {
+                operand.Uses.Remove(parent);
+            }
+        }
+
+        public static void RemoveDef(IAstNode node, IAstNode parent)
+        {
+            if (node is AstOperand operand && operand.Type == OperandType.LocalVariable)
+            {
+                operand.Defs.Remove(parent);
+            }
+        }
+
+        public static AstAssignment Assign(IAstNode destination, IAstNode source)
+        {
+            return new AstAssignment(destination, source);
+        }
+
+        public static AstOperand Const(int value)
+        {
+            return new AstOperand(OperandType.Constant, value);
+        }
+
+        public static AstOperand Local(VariableType type)
+        {
+            AstOperand local = new AstOperand(OperandType.LocalVariable);
+
+            local.VarType = type;
+
+            return local;
+        }
+
+        public static IAstNode InverseCond(IAstNode cond)
+        {
+            return new AstOperation(Instruction.LogicalNot, cond);
+        }
+
+        public static IAstNode Next(IAstNode node)
+        {
+            return node.LLNode.Next?.Value;
+        }
+
+        public static IAstNode Previous(IAstNode node)
+        {
+            return node.LLNode.Previous?.Value;
+        }
+    }
+}
\ No newline at end of file
-- 
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